#!/usr/bin/env node

/*******************************************************************************
 * Licensed Materials - Property of IBM
 * (c) Copyright IBM Corporation 2019. All Rights Reserved.
 *
 * Note to U.S. Government Users Restricted Rights:
 * Use, duplication or disclosure restricted by GSA ADP Schedule
 * Contract with IBM Corp.
 *******************************************************************************/
/*
 * Copyright Contributors to the Open Cluster Management project
 */

/**
 * Module dependencies.
 */

const debug = require('debug')('kui-proxy/webapp')
const https = require('https')
const fs = require('fs')

const { app, setServer } = require('../app')

/**
 * Get port from environment and store in Express.
 */

const port = normalizePort(process.env.PORT || '3000')
app.set('port', port)

/** server options */
const options = {
  key: fs.readFileSync('/etc/certs/tls.key'),
  cert: fs.readFileSync('/etc/certs/tls.crt'),
  requestCert: false,
  rejectUnauthorized: false
}

/**
 * Create HTTP server.
 */
const server = https.createServer(options, app)
setServer(server, port)

/**
 * Listen on provided port, on all network interfaces.
 */
server.listen(port)
server.on('error', onError)
server.on('listening', onListening)

/**
 * Normalize a port into a number, string, or false.
 */

function normalizePort (val) {
  const port = parseInt(val, 10)

  if (isNaN(port)) {
    // named pipe
    return val
  }

  if (port >= 0) {
    // port number
    return port
  }

  return false
}

/**
 * Event listener for HTTP server "error" event.
 */

function onError (error) {
  if (error.syscall !== 'listen') {
    throw error
  }

  const bind = typeof port === 'string'
    ? 'Pipe ' + port
    : 'Port ' + port

  // handle specific listen errors with friendly messages
  switch (error.code) {
    case 'EACCES':
      console.error(bind + ' requires elevated privileges')
      return process.exit(1)
    case 'EADDRINUSE':
      console.error(bind + ' is already in use')
      return process.exit(1)
    default:
      throw error
  }
}

/**
 * Event listener for HTTP server "listening" event.
 */

function onListening () {
  const addr = server.address()
  const bind = typeof addr === 'string'
    ? 'pipe ' + addr
    : 'port ' + addr.port
  debug('Listening on ' + bind)
}
